Debts and Letters of Credit (Details)			3 Months Ended		6 Months Ended
	Aug. 17, 2015 $ / shares	Aug. 21, 2013 USD ($)	Jan. 02, 2016 USD ($) letter_of_credit $ / shares	Dec. 27, 2014 USD ($) $ / shares	Jan. 02, 2016 USD ($) letter_of_credit $ / shares	Dec. 27, 2014 USD ($) $ / shares	Jun. 27, 2015 USD ($)
Carrying amounts of the liability and equity components:
Short-term debt			$ 0		$ 0		$ 0
Outstanding Letters of Credit
Number of standby letters of credit | letter_of_credit			10		10
Letters of credit outstanding			$ 14,300,000		$ 14,300,000
0.625% Senior Convertible Notes
Carrying amounts of the liability and equity components:
Principal amount of notes			650,000,000		650,000,000		650,000,000
Unamortized discount of liability component			(75,200,000)		(75,200,000)		(88,400,000)
Carrying value of the liability component		$ 515,600,000	574,800,000		574,800,000		561,600,000
Carrying amount of equity component		134,400,000	$ 134,400,000		$ 134,400,000		134,400,000
Aggregate principal amount of convertible debt		$ 650,000,000.0
Interest rate on senior convertible notes (as a percent)		0.625%	0.625%	0.625%	0.625%	0.625%
Proceeds from issuance of convertible notes after issuance costs		$ 636,300,000
Conversion price of debt (in dollars per share) | $ / shares	$ 11.28		$ 11.28	$ 11.28	$ 11.28	$ 11.28
Discount rate used to calculate the carrying value of the liability component of the convertible debt (as a percent)		5.40%
Variable rate basis term on which discount rate is based		5 years
Remaining term of convertible notes					2 years 7 months 6 days
Deferred finance costs		$ 13,700,000
Liability component, debt issuance cost		10,900,000
Equity component, debt issuance cost		$ 2,800,000
Fair market value of convertible debt			$ 610,100,000		$ 610,100,000		$ 644,000,000
Interest expense for the contractual interest and the amortization of debt discount
Effective interest rate (as a percent)		5.40%	5.40%	5.40%	5.40%	5.40%
Interest expense-contractual interest			$ 1,000,000	$ 1,000,000	$ 2,000,000	$ 2,000,000
Accretion of debt discount			6,600,000	$ 6,300,000	13,200,000	$ 12,500,000
0.625% Senior Convertible Notes | Other non-current assets
Carrying amounts of the liability and equity components:
Unamortized portion of debt issuance cost			$ 6,100,000		$ 6,100,000